#define  _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <ctype.h>

int main()
{
	int i = 0;
	char str[] = "Are you ok?";
	for (i = 0; str[i] != '\0'; i++)
	{
		if (islower(str[i]) != 0)
		{
			str[i] = toupper(str[i]);
		}
	}
	printf("%s\n", str);
	return 0;
}
